GNSS Positioning

Status and Features
Nowadays, GNSS receivers have scores – and often hundreds – of channels, enabling them to track GPS, Glonass, Galileo and Compass signals simultaneously. The whole workflow from satellite tracking to calculating the coordinates of the position in a preferred reference system can be conducted automatically in real time. The price of GNSS receivers has dropped steadily since the first GPS receivers came onto the commercial market in 1982. In conjunction with the latest product survey results for GNSS receivers (available at www.geo‑matching.com), the author puts today’s GNSS status and features in perspective. (By Mathias Lemmens, senior editor, GIM International, The... (read more)
2012-12-18 01:53:20

Hemisphere GNSS Releases New GNSS RTK Engine

Hemisphere GNSS has announced the launch of Athena, its next-generation GNSS engine. According to the company, the new core engine has been designed to maximise the ability to excel at the rigorous GNSS requirements of multiple market segment customers in machine control, survey and GIS. Athena is developed for application in virtually every environment where high-accuracy GNSS receivers can be used. Hemisphere’s customers have tested and proven Athena’s performance in long baseline, in open-sky environments, under heavy canopy, and in geographic locations experiencing significant scintillation. The company claims the brand-new GNSS RTK engine has one of the most reliably consistent... (read more)
2015-05-08 11:09:16
2017-02-06 10:08:27

GNSS Baseband Chip

OLinkStar offers OTrack32 GPS/BeiDou-2/GLONASS 32-channel baseband chip delivering hig performance using low power. The chip is capable of receiving multi-band GNSS signals simultaneously up to four groups and processing signals concurrently to make multiple constellation navigation possible within a single chip. The OTrack32 is designed in a host-based architecture. The chip supports position update rates of 1, 5, and 10Hz, up to 20Hz. The chip offers friendly interface with various processors including ARM, MIPS, DSP etc. (read more)
2010-11-04 10:34:12

GNSS Handheld Data Collector

Nexteq Navigation, Canada, has announced the T5A multifunctional GNSS handheld data collector. This device is a high-accuracy GPS unit capable of 2.0cm accuracy using Real Time Kinematics (RTK) and 50cm globally using Nexteq’s i-PPP technology. The T5A combines its centimetre-level precision with a versatility allowing for accurate data collection in various weather conditions. The T5A is equipped with a 3.7” colour touch screen that is with its IP66 rating both waterproof and dustproof and includes features such as Bluetooth, Wi-Fi, digital cellular data and voice, microSD card slots and a 3.0 megapixel digital camera. Like all Nexteq Navigation GPS handhelds,... (read more)
2012-06-05 12:00:00

New Topcon GNSS Receiver

The new GR-5 GNSS receiver from Topcon Positioning Systems (TPS, USA) introduces its Fence Antenna technology and expanded channel support, providing high tracking sensitivity and multipath rejection in a compact and lightweight package. The device can perform any task for survey, engineering or construction, and its rugged I-beam design can withstand a two-metre (six-foot) drop onto concrete.   The new GR-5 receiver features also include a high-accuracy RTK engine with position updates up to 100Hz; integrated dual communication system with multiple radio and cellular combinations; IP66 dustproof and waterproof rating; MIL-STD shock and vibration tolerance and Bluetooth connectivity. It operates... (read more)
2011-03-21 10:50:17

French Surveyors’ GNSS

The French Order of Chartered Surveyors (Ordre des Géomètres Experts) has set itself the objective of completing a GNSS network over the national territory. This network will allow positioning in real time with a precision better than an inch (2.5cm) anywhere within France. About five hundred surveyors, one third of the profession, already support the network. The project will begin during the first quarter of 2005 and the network will be completely rolled out across the entire country by the end of 2005. It will benefit from the labelling of reference stations by the IGN for ensuring their integration into... (read more)
2005-03-16 12:00:00

David GNSS Survey Receivers

David GNSS Survey Receivers (read more)
2018-05-25 09:52:05

High-precision GNSS Receivers

The benefits and availability of new signals and systems
What will the new GNSS signals bring to the user of high-precision receivers? This article provides a brief overview of what users can expect from GNSS systems that are currently in the modernisation/development stage, looking at new signals and emerging techniques including coverage of GNSS developments such as GPS, Galileo, GLONASS and Compass/Beidou. In view of the planned timeframe, what we can do to improve the robustness of our receivers with a special focus on interference and the upcoming solar maximum? The use of high-precision GPS for surveying applications has increased dramatically over the last decade. GPS receivers can provide... (read more)
2011-11-09 03:18:00

Four times GNSS

A Worldwide Race
The Munich Satellite Navigation Summit opened during the first week in March 2009 with a plenary session entitled ‘The Worldwide Race in GNSS’ and closed with a panel discussion on the subject of ‘competition among the Big Four’. Although several speakers did their best to convince attendees that there was no race or competition, it is obvious that four systems serving the same market will be involved in a race for the best technical solutions and engage in fierce competition. If it is indeed a race/competition, let us have a look at the score so far. GPS Since 1978 this... (read more)
2009-06-30 12:00:00
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